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Home > Products > Fittings > Tube Fittings and Tube Adapters

Tube Fittings and Tube Adapters

Swagelok® Gaugeable Tube Fittings and Adapter Fittings

Tube Fittings

The live-loaded, two-ferrule tube fitting is easy to install, with no torque transmitted to tubing during installation. The Swagelok gap inspection gauge ensures sufficient pull-up upon initial installation.


Swagelok tube fitting performance in extreme conditions has been proven with over 65 years of success and documented in numerous published test reports. See the performance demonstrated live during eight tests in the video, "Swagelok Tube Fitting Extreme Testing".

 



Specifications

Pressure Ratings
Material
End Connections
• Types


• Sizes
Configurations

Up to 11 000 psig / 760 bar
316 stainless steel, brass, carbon steel

NPT, ISO/BSP, SAE/MS, AN, weld ends, port connectors, sanitary flanges, tube adapters
1/16 to 2 in.; 2 to 50 mm
Straights, elbows, tees, crosses, caps, plugs, nuts, ferrules


Features

Two-Ferrule, Mechanical Grip Design
The two ferrules separate sealing and tube gripping functions; each ferrule is optimized for its function. The front ferrule creates a seal against the fitting body and on the tubing outside diameter. As the nut is turned, the back ferrule axially advances the front ferrule and radially applies an effective tube grip

Advanced-Geometry, Hinging-Colleting Back Ferrule Design
 Tube Fitting Cutaway View

During assembly of the advanced-geometry design (above), the front ferrule is driven into the fitting body and the tubing to create primary seals, while the back ferrule hinges inward to create a strong grip on the tubing. The back ferrule geometry allows for an improved engineering hinging-colleting action that translates axial motion into radial swaging action on the tube, yet operates with a low assembly torque requirement.

This design is standard on all 1/4 to 1/2 in. and 6 to 12 mm Swagelok stainless steel tube fittings to help installers make more consistent, leak-tight tube connections.

In these sizes, a patented case hardening process and patented recessed and contoured geometry provide unique engineering to the Swagelok back ferrule. The hinging-colleting back ferrule design expands on the already robust performance of the traditional ferrule design and provides:
  • excellent gas-tight sealing and tube-gripping action
  • easily achieved proper installation
  • consistent remakes
  • excellent vibration fatigue resistance and tube support
  • full compatibility with original Swagelok stainless steel tube fittings of identical sizes.


Cleaning and Packaging

Fitting components are cleaned to remove machine oil, grease, and loose particles. For more information, see Swagelok Standard Cleaning and Packaging (SC-10). Fittings are available individually bagged.
On request, fittings can be cleaned and packaged in accordance with Swagelok Special Cleaning and Packaging (SC-11) with front ferrules silver plated and Krytox® 240 AC applied to the internal surface of the nut.


Options and Accessories

Replacement parts, including nuts, ferrules, nut-ferrule sets, and ferrule sets are available.
Gap inspection gauges, depth marking tools, bulkhead retainers, inserts for soft plastic tubing, preswaging tools, and hydraulic swaging units are available.

 

SAT12® Process

In 1999, Swagelok Company introduced its next-generation Swagelok tube fitting with an enhanced back ferrule geometry case hardened with the Swagelok SAT12 service. The result was improved gripping power and enhanced gas seal capabilities to enable a reduction in fugitive emissions and leaks in a range of industries across the world – from power, nuclear and chemical to oil and gas exploration. The Swagelok tube fitting enables the world’s industries to reduce energy consumption and contain hazardous fluids from being released into the environment.

 

Swagelok won the 2006 Engineering Materials Achievement Award for its surface treatment that both hardens the surface of stainless steel and improves corrosion resistance.

 

Read about and download United States Patents granted for the SAT12 process.

Low-Temperature Case-Hardening Processes

Inventors Peter C Williams, Cleveland Heights, OH Steven V. Marx, University Heights, OH

Assignee Swagelok Company, Solon, OH U.S.A

Patent Number 6,093,303 B1

Date of Patent July 25, 2000

Abstract

A method of case hardening a chromium bearing nickel or ferrous based alloy, for example stainless steel, article, the method including the steps of activating the surface of the article; and carburizing the activate surface at a temperature below that temperature which would promote the formation of carbides. In one embodiment the surface is activated by disposing a layer of iron over the surface of the article.

Download patent number 6,093,303 B1


Selective Case Hardening Processes at Low Temperature

Inventors Peter C Williams, Cleveland Heights, OH Steven V. Marx, University Heights, OH

Assignee Swagelok Company, Solon, OH U.S.A

Patent Number 6,165,597 B1

Date of Patent December 26, 2000

Abstract

A selectively case hardened steel article by low temperature carburization includes a body made of chromomium-bearing nickel or ferrous-based all0y (for example stainless steel), a first portion of the body having a first hardness characteristics, and a second portion of the body having a second hardness characteristic; the second portion being less than the entire body and substantially free of carbides. One method for selective case harding by low-temperature carburization includes the steps of applying a carbon blocking mask over surface areas of the article that are not going to be carburized; activating those surface areas that are to be carburized; diffusing carbon into the activated surface areas at temperature below which carbides readily form; and remove the carbon blocking mask.

Download patent number 6,165,597 B1


Selective Case Hardening Processes at Low Temperature

Inventors Peter C Williams, Cleveland Heights, OH Steven V. Marx, University Heights, OH

Assignee Swagelok Company, Solon, OH

Patent Number 6,461,448 B1

Date of Patent October, 8, 2002

Abstract

A method for case hardening a chromium bearing nickel or ferrous based alloy, for example stainless steel, article, the method including the steps of activating the surface of the article; and carburizing the activated surface of the article at a temperature below that temperature which would promote the formation of carbides. In one embodiment the surface is activated by disposing of a layer of iron over the surface of the article.

Download patent number 6,461, 448 B1


Modified Low-Temperature Case-Hardening Process

Inventors Peter C Williams, Cleveland Heights, OH Steven V. Marx, University Heights, OH

Assignee Swagelok Company, Solon, OH U.S.A

Patent Number 6,547,888 B1

Date of Patent April, 15, 2003

Abstract

An iron-containing workpiece is cased hardened by low-temperature carburization during which one or more process steps - including adjusting the carburization temperature, adjusting the concentration of the carburization specie in the carburization gas and reactivating the surfaces to be carburized - is carried out to enhance the overall rate and uniformity of the carburization with minimized soot generation whereby carburization can be completed faster than possible in the past.

Download patent number 6,547,888 B1

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